矿物基蚯蚓粪表面特征及其对土壤Cd钝化能力的研究
S216%X505; 针对农田土壤镉(Cd)活性高的问题,以寻求具有良好重金属钝化特性的原位修复材料为目标,该研究以铁粉、磷矿粉和牛粪混合蚯蚓堆肥所制备的矿物基蚯蚓粪为研究对象,利用系列结构表征手段对其进行基本性质表征,并进一步分析矿物基蚯蚓粪施加下土壤对Cd吸附、有效性和赋存形态的影响,最终筛选出具有良好Cd钝化效果的矿物基蚯蚓粪.结果表明,铁粉及磷矿粉的添加使矿物基蚯蚓粪中的pH值、C/N、有机质含量有所降低,但总养分含量显著增加(P＜0.05).比表面积及孔隙度、扫描电镜分析和X射线能谱分析结果表明,矿物质的添加增大了蚯蚓粪比表面积和孔容,改变了蚯蚓粪中矿物元素的占比.傅立叶变换红外光谱...
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| Published in | 农业工程学报 Vol. 39; no. 23; pp. 220 - 229 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
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中国科学院大学,北京 100049
01.12.2023
郑州大学生态与环境学院,郑州 450001%中国热带农业科学院环境与植物保护研究所,海口 571101 海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国科学院地理科学与资源研究所,北京 100101 海南省热带生态循环农业重点实验室,海口 571101 海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国热带农业科学院环境与植物保护研究所,海口 571101 |
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| Abstract | S216%X505; 针对农田土壤镉(Cd)活性高的问题,以寻求具有良好重金属钝化特性的原位修复材料为目标,该研究以铁粉、磷矿粉和牛粪混合蚯蚓堆肥所制备的矿物基蚯蚓粪为研究对象,利用系列结构表征手段对其进行基本性质表征,并进一步分析矿物基蚯蚓粪施加下土壤对Cd吸附、有效性和赋存形态的影响,最终筛选出具有良好Cd钝化效果的矿物基蚯蚓粪.结果表明,铁粉及磷矿粉的添加使矿物基蚯蚓粪中的pH值、C/N、有机质含量有所降低,但总养分含量显著增加(P＜0.05).比表面积及孔隙度、扫描电镜分析和X射线能谱分析结果表明,矿物质的添加增大了蚯蚓粪比表面积和孔容,改变了蚯蚓粪中矿物元素的占比.傅立叶变换红外光谱分析表明,矿物基蚯蚓粪中醇或羧酸类、芳香类以及多糖类物质增多,脂类和碳水化合物减少.X射线衍射分析表明,添加铁粉及磷矿粉制备出来的矿物基蚯蚓粪增加了磷酸盐、纳米零价铁等矿物组分.土壤培养和吸附解吸试验表明,施加矿物基蚯蚓粪显著提升了土壤对Cd的吸附强度,降低了对Cd的解吸率,其中以牛粪+20%铁粉+20%磷矿粉(VCFe+P)进行蚯蚓堆肥所获得的矿物基蚯蚓粪处理的土壤对Cd的吸附效果最佳,较施加纯蚯蚓粪的土壤吸附容量提升 137.66%,解吸率降低 7.34%～12.76%;该处理的土壤Cd钝化率高达 50.02%,Tessier形态分析结果表明,VCFe+P矿物基蚯蚓粪使交换态Cd向铁锰氧化态Cd和残渣态转化.综上,20%铁粉+20%磷矿粉+牛粪混合蚯蚓堆肥所制备的矿物基蚯蚓粪具有良好的Cd吸附表面特征和高效的Cd钝化能力,在土壤Cd污染修复方面具有较大的应用前景. |
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| AbstractList | S216%X505; 针对农田土壤镉(Cd)活性高的问题,以寻求具有良好重金属钝化特性的原位修复材料为目标,该研究以铁粉、磷矿粉和牛粪混合蚯蚓堆肥所制备的矿物基蚯蚓粪为研究对象,利用系列结构表征手段对其进行基本性质表征,并进一步分析矿物基蚯蚓粪施加下土壤对Cd吸附、有效性和赋存形态的影响,最终筛选出具有良好Cd钝化效果的矿物基蚯蚓粪.结果表明,铁粉及磷矿粉的添加使矿物基蚯蚓粪中的pH值、C/N、有机质含量有所降低,但总养分含量显著增加(P＜0.05).比表面积及孔隙度、扫描电镜分析和X射线能谱分析结果表明,矿物质的添加增大了蚯蚓粪比表面积和孔容,改变了蚯蚓粪中矿物元素的占比.傅立叶变换红外光谱分析表明,矿物基蚯蚓粪中醇或羧酸类、芳香类以及多糖类物质增多,脂类和碳水化合物减少.X射线衍射分析表明,添加铁粉及磷矿粉制备出来的矿物基蚯蚓粪增加了磷酸盐、纳米零价铁等矿物组分.土壤培养和吸附解吸试验表明,施加矿物基蚯蚓粪显著提升了土壤对Cd的吸附强度,降低了对Cd的解吸率,其中以牛粪+20%铁粉+20%磷矿粉(VCFe+P)进行蚯蚓堆肥所获得的矿物基蚯蚓粪处理的土壤对Cd的吸附效果最佳,较施加纯蚯蚓粪的土壤吸附容量提升 137.66%,解吸率降低 7.34%～12.76%;该处理的土壤Cd钝化率高达 50.02%,Tessier形态分析结果表明,VCFe+P矿物基蚯蚓粪使交换态Cd向铁锰氧化态Cd和残渣态转化.综上,20%铁粉+20%磷矿粉+牛粪混合蚯蚓堆肥所制备的矿物基蚯蚓粪具有良好的Cd吸附表面特征和高效的Cd钝化能力,在土壤Cd污染修复方面具有较大的应用前景. |
| Abstract_FL | This study aims to seek in situ remediation materials with a high immobilization efficiency for heavy metals.The mineral-based vermicompost was prepared using cow dung mixed with iron powder and phosphate rock powder minerals.A vermicomposting experiment was also carried out.The mineral-based vermicompost was then examined using a series of structural characterization tools.The remediation effectiveness was assessed to screen the suitable amendments for soil.The adsorption-desorption characteristics were analyzed for the available properties and chemical forms of cadmium(Cd)in soil.The results demonstrated that the addition of iron powder and phosphate rock powder reduced the pH,C/N,and organic matter content in the mineral-based vermicompost,while significantly increasing the total nutrient content.Brunauer-Emmett-Teller(BET)specific surface area measurement,Scanning electron microscopy(SEM)and X-ray energy dispersive analysis(EDS)showed that the mineral-based vermicompost increased the specific surface area and pore volume,whereas,there was a decrease in the pore diameter,compared with the vermicompost(VC).The mineral addition also changed the percentage of mineral elements in the vermicompost.Fourier transform infrared spectroscopy(FTIR)showed that the mineral-based vermicompost had more alcohol or carboxylic acid aromatic compounds and polysaccharides,but fewer carbohydrates and lipids,compared with the vermicompost.X-ray diffraction(XRD)showed that more mineral fractions were found in the mineral-based vermicompost,compared with the untreated.Most mineral components were found in the VCFe+P treatment,such as phosphate and nano-zero-valent iron.Soil culture and adsorption/desorption experiments showed that the application of mineral-based vermicompost enhanced the adsorption efficiency of Cd in the soil,where there was a decrease in the desorption rate of Cd.The best Cd adsorption was achieved in the soil of mineral-based vermicompost with cow manure,20%iron powder and 20%phosphate rock powder(VCFe+P).The adsorption capacity increased by 137.66%,and the desorption rate decreased by 7.34%-12.76%,compared with the VC application.The VCFe+P treatment was reduced by 50.02%of the available Cd contaminants.Furthermore,The VCFe+P also promoted the transformation of Cd from exchangeable frictions to Fe/Mn oxide fractions and the residual fractions.In summary,the mineral-based vermicompost was produced from a mixture of cow dung.The better adsorption surface and immobilization on soil Cd were achieved in the 20%iron powder and 20%phosphonate powder.There was a great application prospect in the soil remediation of Cd pollution. |
| Author | 李勤奋 雷梅 潘攀 刘会展 刘贝贝 杨学林 |
| AuthorAffiliation | 郑州大学生态与环境学院,郑州 450001%中国热带农业科学院环境与植物保护研究所,海口 571101;海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国热带农业科学院环境与植物保护研究所,海口 571101;海南省热带生态循环农业重点实验室,海口 571101;海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国科学院地理科学与资源研究所,北京 100101;中国科学院大学,北京 100049 |
| AuthorAffiliation_xml | – name: 郑州大学生态与环境学院,郑州 450001%中国热带农业科学院环境与植物保护研究所,海口 571101;海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国热带农业科学院环境与植物保护研究所,海口 571101;海南省热带生态循环农业重点实验室,海口 571101;海南儋州热带农业生态系统国家野外科学观测研究,儋州 571737%中国科学院地理科学与资源研究所,北京 100101;中国科学院大学,北京 100049 |
| Author_FL | LIU Huizhan PAN Pan LIU Beibei LI Qinfen LEI Mei YANG Xuelin |
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| Keywords | minerals adsorption 矿物 vermicompost 吸附 镉 cadmium soil 蚯蚓粪 土壤 |
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| Title | 矿物基蚯蚓粪表面特征及其对土壤Cd钝化能力的研究 |
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